煙草中常規(guī)化學成分的近紅外分析研究.pdf

1、吉首大學碩士學位論文煙草中常規(guī)化學成分的近紅外分析研究姓名：李永福申請學位級別：碩士專業(yè)：分析化學指導教師：李輝20100601ABSTRACT第ii頁ABSTRACTABSTRACTNearinfrared(NIR)Spectroscopyanewhighefficiencyanalyticaltechniquehasbeenreceivedconsiderableattentioninallwalksoflifeduetothera

2、pidspeedofanalysissimplepreparationofthesamplelowcostsimultaneousdeterminationofmulticomponentmanyotheradvantages.Atpresentthetechnologyhasbeenappliedtoagriculturefoodbiologicalpolymerpharmaceuticalpetrochemicaltextilesc

3、ienceotherfieldssuccessfully.Inthispapernearinfraredquantitativeanalysisofsixkindsofconventionalchemicalcompositionwhichweretotalsugar、reducingsugar、chline、potassium、nicotinetotalnitrogenintobaccowerestudied.Thechemicald

4、eterminationofsixkindsofconventionalchemicalcompositionwhichweretotalsugar、reducingsugar、chline、potassium、nicotinetotalnitrogenintobaccowereperfmedfirstlybyclassicalchemicalanalyticalmethodthenbynearinfraredspectroscopym

5、ethodinthisstudy.Bycomparisonbetweenchemicalnearinfraredspectroscopyanalysismethodthepredictivepowerofnearinfraredquantitativeanalysismodelwasverified.Ithasbeenvalidatedthatthecrelationcoefficient(R)betweenNIRpredictedre

6、sultstheactuallyresults.Theresultsoftotalsugar、reducingsugar、chline、potassium、nicotinetotalnitrogenintobaccowere0.9546、0.9585、0.9296、0.9236、0.9688、0.9794respectively.Bystatisticalsignificancetesttheresultsofpredictionwer

7、ecomparedwiththoseofstardmethodswithnosignificantdifference.TheaveragerelativeerrsbetweenNIRpredictedresultstheactuallyresultsthatwerefromtotalsugar、reducingsugar、chline、potassium、nicotinetotalnitrogenintobaccowere1.42%、

8、1.76%、4.72%、2.97%、3.25%、1.90%respectively.Theaveragerelativedeviationsofother4kindswerelessthan3%exceptfchlinenicotine.Theaveragerelativedeviationsof6kindsofcomponentswereabout3%whichwereclosetotheparallelexperimentalpre

9、cisionthatclassicalchemicalanalyticalmethodrequired.Ithasbeenindicatedthatthedeterminationoftheconventionalchemicalcompositionintobaccobynearinfraredspectroscopyhasahighprecisionitisareliablemethod.Themodelissuitablefthe

10、occasionwherealargenumberoftobaccosamplesaretobeanalyzedinshttime.Itisexaminedthattheimpactsofparticlesizewatercontenttemperatureoftobaccopowdersamplesonnearinfrared(NIR)predictedvaluesoftotalsugar、reducingsugar、chline、p